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低纬度高原宇宙线快中子土壤水分监测方法适宜性研究

王中金 吴苏 吴东丽 张振强 赵杰 李鹏 陈海波

王中金, 吴苏, 吴东丽, 张振强, 赵杰, 李鹏, 陈海波. 低纬度高原宇宙线快中子土壤水分监测方法适宜性研究[J]. 中国生态农业学报 (中英文), 2022, 30(8): 1328−1335 doi: 10.12357/cjea.20210895
引用本文: 王中金, 吴苏, 吴东丽, 张振强, 赵杰, 李鹏, 陈海波. 低纬度高原宇宙线快中子土壤水分监测方法适宜性研究[J]. 中国生态农业学报 (中英文), 2022, 30(8): 1328−1335 doi: 10.12357/cjea.20210895
WANG Z J, WU S, WU D L, ZHANG Z Q, ZHAO J, LI P, CHEN H B. Suitability of the cosmic-ray fast neutron soil moisture monitoring method in a low-latitude plateau[J]. Chinese Journal of Eco-Agriculture, 2022, 30(8): 1328−1335 doi: 10.12357/cjea.20210895
Citation: WANG Z J, WU S, WU D L, ZHANG Z Q, ZHAO J, LI P, CHEN H B. Suitability of the cosmic-ray fast neutron soil moisture monitoring method in a low-latitude plateau[J]. Chinese Journal of Eco-Agriculture, 2022, 30(8): 1328−1335 doi: 10.12357/cjea.20210895

低纬度高原宇宙线快中子土壤水分监测方法适宜性研究

doi: 10.12357/cjea.20210895
基金项目: 中国气象局·河南省农业气象保障与应用技术重点开放实验室开放研究基金(AMF202103)和郑州市重大科技创新专项项目(2020CXZX0043)资助
详细信息
    作者简介:

    王中金, 主要研究方向为气象探测传感器及系统应用。E-mail: wangzhongjin2001@foxmail.com

    通讯作者:

    陈海波, 主要研究方向为农业气象自动化观测。E-mail: chenhaibo1116@163.com

  • 中图分类号: S152.7

Suitability of the cosmic-ray fast neutron soil moisture monitoring method in a low-latitude plateau

Funds: This study was supported by the Open Research Foundation of China Meteorological Administration·Henan Key Laboratory of Agrometeorological Support and Applied Technique (AMF202103) and the Major Scientific and Technological Innovation Projects in Zhengzhou City (2020CXZX0043).
More Information
  • 摘要: 宇宙线快中子土壤水分监测方法具有监测范围大、不受土壤盐碱程度影响、实时无损原位测量的特点, 对旱涝预警、节水灌溉、生态环境保护及土壤生产力提升等具有重要意义。为明确宇宙线快中子土壤水分监测方法在低纬度高原的适宜性, 本研究在中国南部开展了大范围烘干称重法测量, 验证宇宙线快中子法准确性, 以频域反射法做连续监测对比, 分析土壤水分相关性, 并结合雨量站观测数据, 研究其对土壤水分连续变化的响应能力。试验结果表明, 宇宙线快中子法与多点烘干称重法的线性拟合优度、均方根误差及绝对误差分别为0.898、0.013 cm3∙cm–3和0.027 cm3∙cm–3, 说明宇宙线快中子法在低纬度高原能够准确测量区域土壤含水量。在较长时间序列上, 宇宙线快中子法与频域反射法10 cm的土壤水分变化趋势完全一致, 线性拟合优度为0.839; 在对降水响应的灵敏性上, 降水量2 mm以上的降水过程, 两种方法均有明显响应, 降水量2 mm以下的降水过程, 宇宙线快中子法要略优于频域反射法。在本试验中, 宇宙线快中子土壤水分监测方法在低纬度高原区是适宜的, 对土壤水分空间变异性不敏感, 对百米级范围的平均土壤含水量的测量准确可信, 测量性能满足当前土壤含水量观测要求, 且能够提供实时土壤水分信息, 有效提高中尺度土壤水分监测效率与精度, 为相关土壤水分监测研究与应用提供参考, 对低纬度高原土地资源开发利用、环境保护、粮食自给等具有重要意义。
  • 图  1  人工取样位置及取样深度示意图

    Figure  1.  Location and depth of artifical sampling points

    图  2  宇宙线快中子法与烘干称重法的土壤含水量测量结果对比

    Figure  2.  Comparison between soil moisture measured by cosmic-ray fast neutron method and drying weighing method

    图  3  宇宙线快中子法与烘干称重法测定的土壤含水量线性拟合

    Figure  3.  Linear fitting between soil moisture measure by cosmic-ray fast neutron method and drying weighing method

    图  4  宇宙线快中子法与FDR法土壤含水量测量结果对比

    Figure  4.  Comparison between soil moisture measured by cosmic-ray fast neutron method and Frequency Domain Reflectometry (FDR) method

    图  5  宇宙线快中子法及FDR法土壤含水量测量数据趋势分析

    Figure  5.  Trend analysis of soil moisture measured by cosmic-ray fast neutron method and Frequency Domain Reflectometry (FDR) method

    表  1  宇宙线快中子法与FDR法测定的土壤含水量的相关性分析

    Table  1.   Correlation analysis of soil moisture between cosmic-ray fast neutron method and Frequency Domain Reflectometry method

    深度 Depth (cm)0~100~200~300~400~50
    R20.8390.8260.8050.8090.792
    RMSE (cm3·cm–3)0.0570.0450.0440.0370.036
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-12-17
  • 录用日期:  2022-03-14
  • 网络出版日期:  2022-03-21
  • 刊出日期:  2022-08-01

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